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Forrest plot summarising the effect of statins on abdominal aortic aneurysm growth. Shown is the mean difference (MD) and 95% CIs. MD is the mean difference in abdominal aortic aneurysm growth rate (mm/year) between participants who received statins and those who did not receive statins. Boxes represent a point estimate of the effect and study size. Lines represent 95%CI of the effect.
